#!/bin/bash

function __rvm_meta {
  rvm_meta_author="Wayne E. Seguin"
  rvm_meta_author_email="wayneeseguin@gmail.com"
  rvm_meta_website="http://rvm.beginrescueend.com/"
  rvm_meta_version="`cat $rvm_path/lib/VERSION.yml | tail -n 3 | sed 's/^.*: //g' | tr "\n" '.' | sed 's/\.$//'`"
  rvm_meta_updated="2009.09.24"
}

function __rvm_version { __rvm_meta ; echo "rvm $rvm_meta_version ($rvm_meta_updated) [$rvm_meta_website]" ; }

function __rvm_usage {

  __rvm_meta

  echo -e "
  rvm ${rvm_meta_version} ${rvm_meta_website} by ${rvm_meta_author} (${rvm_meta_author_email})

Usage

  rvm Action [Implementation] [Flags] [Options]

Action

  * usage   - show this usage information
  use       - setup current shell to use a specific ruby version
  info      - show information for current ruby
  list      - show currently installed versions
  reload    - reload rvm source itself (useful after changing rvm source)
  implode   - removes all ruby installations it manages, everything in ~/.rvm
  update    - upgrades rvm to the latest version.
  reset     - remove default and current settings, exit the shell.
              (If you experience odd behavior try this first)
  debug     - emit environment & configuration information for *current* ruby

  install   - install one or many ruby versions
  uninstall - uninstall one or many ruby versions, leaves their sources
  remove    - uninstall one or many ruby versions and remove their sources

  ruby      - runs a named ruby file against specified and/or all rubies
  gem       - runs a gem command using selected ruby's 'gem'
  rake      - runs a rake task against specified and/or all rubies
  tests     - runs 'rake test' across selected ruby versions
  specs     - runs 'rake spec' across selected ruby versions

  gemsync   - sync gems from a specified version to current version
  gemdir    - switch to gem directory for installation (new login shell)
  srcdir    - switch to src directory for the current ruby installation

Implementation

  * ruby    - MRI/YARV Ruby (The Standard), defaults to 1.8.6
  jruby     - jRuby
  rbx       - rubinius
  ree       - ruby Enterprise Edition
  system    - use the system ruby (eg. pre-rvm state)
  default   - use rvm set default ruby and system if it hasn't been set.

Flags

  --self        - with update, updates rvm itself
  --rubygems    - with update, updates rubygems for selected ruby
  --default     - with ruby select, sets a default ruby for new shells.
  --debug       - Toggle debug mode on for very verbose output.
  --force       - Force install, removes old install & source before install.
  --all         - Used with 'rvm list' to display 'most' available versions.
  --dump        - Used with gemset to dump the current ruby's gemset.
  --load        - Used with gemset to load a specified gemset file
  --summary     - Used with rubydo to print out a summary of the commands run.
  --jit         - Used with rubinius install to build with JIT
  --latest      - with gemset --dump skips version strings for latest gem.
  --reconfigure - Force ./configure on install even if Makefile already exists.

Options

  -v|--version    - Emit rvm version loaded for current shell
  -h|--help       - Emit this output and exit
  -l|--level      - patch level to use with rvm use / install
     --tag        - subersion tag to use
     --rev        - repository revision # to use or 'head' for

     --prefix     - path for all rvm files (~/.rvm/), with trailing slash!
     --bin        - path for binaries to be placed (~/.rvm/bin/)
     --source     - src directory to use (~/.rvm/src/)
     --archives   - directory for downladed files (~/.rvm/archives/)
  -S|--script     - Specify a script file to attempt to load and run (rubydo)
  -G|--gems       - root gem path to use
  -C|--configure  - custom configure options, comma separated
                    default: --enable-shared=true
  --reconfigure   - Force installer to re-run configure if already run
  --make          - custom make command
  --make-install  - custom make install command
  --nice          - process niceness (for slow computers, default 0)
  -m|--gem-set    - use a named gem set, instead of the default set.
  --rm-gem-set    - Remove a named gem set

Resources:

  http://rvm.beginrescueend.com/
  https://www.pivotaltracker.com/projects/26822

" | ${PAGER:-/usr/bin/less}
}

function __rvm_parse-args {
  while [ $# -gt 0 ] ; do
    rvm_token="$1" ; shift
    case "$rvm_token" in
      install|uninstall|path|info|setup|version|srcdir|list|reset|debug|reload|implode|update|readline|iconv|use|gemsync)
        rvm_action=$rvm_token
      ;;

      inspect)
        rvm_action=$rvm_token
        rvm_ruby_args=$*
        rvm_parse_break=1
      ;;

      rm|remove)
        rvm_action=remove
      ;;

      system|default)
        rvm_action=${rvm_action:-use}
        rvm_ruby_interpreter="$rvm_token"
      ;;

      jruby|ree|macruby|rbx|rubinius|default|all)
        rvm_ruby_interpreter="$rvm_token"
        rvm_action="${rvm_action:-use}"
      ;;

      gemdir)
        rvm_action=$rvm_token

        if [ "$1" = "system" ] ; then rvm_ruby_interpreter="system" ; shift ; fi
        if [ "$1" = "user" ]   ; then rvm_ruby_interpreter="user"   ; shift ; fi

        rvm_ruby_interpreter="${rvm_ruby_interpreter:-current}"
      ;;

      gemdup)
        rvm_action=$rvm_token
        if [ -z "$1" ] ; then
          rvm_ruby_interpreter="default"
        elif [ "$1" = "system" ] ; then
          rvm_ruby_interpreter=$1 ; shift
        elif [ "$1" = "user" ] ; then
          rvm_ruby_interpreter=$1 ; shift
        elif [ "$1" = "default" ] ; then
          rvm_ruby_interpreter=$1 ; shift
        else
          rvm_ruby_interpreter=$1 ; shift
          rvm_ruby_version=$2 ; shift
        fi
      ;;

      do|ruby|rake|gem|rubydo|rakedo|gemdo)
        if [ "$rvm_action" = "do" ] ; then rvm_action="ruby" ; fi
        rvm_action=$(echo $rvm_token | sed 's/do//g')

        if [ "$rvm_action" = "rake" -o "$rvm_action" = "gem" ] ; then
          rvm_action="ruby"
          rvm_ruby_args="$rvm_token $@"
          rvm_parse_break=1
        else
          if [ ! -z "$(echo $1 | awk '/^-/')" ] ; then
            unset rvm_ruby_version
          else
            if [ ! -z "$(echo $1 | awk '/^[0-9]/')" ] ; then
              rvm_ruby_version=$(echo "$1" | tr ',' ' ') ; shift
              unset rvm_ruby_interpreter
            else
              if [ "$1" = "jruby" -o "$1" = "rbx" -o "$1" = "rubinius" -o "$1" = "macruby" -o "$1" = "ree" -o "$1" = "ruby-enterprise" ] ; then
                rvm_ruby_interpreter=$1 ; shift
              else
                unset rvm_ruby_interpreter rvm_ruby_version
              fi
            fi
          fi
        fi
      ;;

      benchmark|bench)
        rvm_action="benchmark"
      ;;

      specs|tests)
        rvm_action="do"
        rvm_ruby_args="rake $rvm_token"
      ;;

      1.8|1.8.0|1.8.1|1.8.2|1.8.3|1.8.4|1.8.5|1.8.6|1.8.7|1.9|1.9.1|1.9.2)
        rvm_ruby_interpreter=${rvm_ruby_interpreter:-ruby}
        rvm_ruby_version="$rvm_token"
        rvm_action=${rvm_action:-use}
      ;;

      1.2.0|1.3.1)
        rvm_ruby_interpreter=${rvm_ruby_interpreter:-jruby}
        rvm_ruby_version="$rvm_token"
        rvm_action=${rvm_action:-use}
      ;;

      -v|--version)
        if [ -z "$1" ] ; then
          rvm_action="version"
        else
          rvm_ruby_version="$1"
          shift
        fi
      ;;

      -t|--tag)
        rvm_ruby_tag="$1";
        rvm_action="${rvm_action:-use}"
        shift
      ;;

      --head)
        rvm_ruby_rev="head"
        rvm_head_flag=1
        rvm_action="${rvm_action:-use}"
      ;;

      --rev|--revision)
        rvm_ruby_rev="$1";
        rvm_action="${rvm_action:-use}"
        shift
      ;;

      -b|--branch)
        rvm_ruby_branch="$1";
        rvm_action="${rvm_action:-use}"
        shift
      ;;

      --bin)
        if [ "$rvm_action" = "update" ] ; then
          rvm_bin_flag=1
        else
          rvm_bin_path="$1" ; shift
        fi
        ;;

      -j)
        if [ ! -z "$1" ] ; then
          rvm_make_flags="$rvm_make_flags -j$1"
          shift
        else
          rvm_action="error"
          rvm_error_message="-j *must* be followed by an integer (normally the # of CPU's in your machine)."
        fi
      ;;


      -C|--configure)
        if [ ! -z "$1" ] ; then
          rvm_ruby_configure="$(echo $1 | tr ',' ' ')"
          shift
        else
          rvm_action="error"
          rvm_error_message="--configure *must* be followed by configure flags."
        fi
      ;;

      -r|--require)
        if [ -z "$1" ] ; then
          rvm_action="error"
          rvm_error_message="-r|--require *must* be followed by a library name."
        else
          rvm_ruby_require="$rvm_ruby_require -r$1"
          shift
        fi
      ;;

      -I|--include)
        if [ -z "$1" ] ; then
          rvm_action="error"
          rvm_error_message="-I|--include *must* be followed by a path."
        else
          rvm_ruby_load_path="$rvm_ruby_load_path:$1"
          shift
        fi
      ;;

      -f|--file)
        rvm_action="ruby"
        rvm_ruby_file="$1"
        shift
      ;;

      -S|--script|-e|--execute)
        rvm_action="ruby"
        rvm_ruby_args="$@"
        rvm_parse_break=1
      ;;

      --load)
        rvm_load_flag=1
        if [ ! -z "$1" ] ; then
          rvm_load_file="$1"
          shift
        else
           rvm_action="error"
           rvm_error_message="--load must be followed by the .gemset file to load."
           break;
        fi
      ;;

      default|system)
        rvm_action="use"
        rvm_ruby_interpreter="system"
      ;;

      --install)            rvm_install_on_use_flag=1         ;;
      --prefix)             rvm_prefix_path="$1"      ; shift ;;
      -G|--gems)            rvm_gem_path="$1"         ; shift ;;
      --source)             rvm_source_path="$1"      ; shift ;;
      --archives)           rvm_archives_path="$1"    ; shift ;;
      --make)               rvm_ruby_make="$1"        ; shift ;;
      --make-install)       rvm_ruby_make_install="$1"; shift ;;
      --nice)               rvm_niceness="$1"         ; shift ;;
      -l|--level)           rvm_ruby_patch_level="$1" ; shift ;;
      -h|--help|usage|help) rvm_action=help         ; shift ;;
      -m|--gem-set)         rvm_gem_set_name="$1"     ; shift ;;
         --rm-gem-set)      rvm_gem_set_name_rm="$1"  ; shift ;;
      tests|specs)          rvm_action="tests"                ;;

      --self|--gem|--rubygems|--reconfigure|--default|--debug|--force|--all|--dump|--summary|--jit|--latest|--yaml|--json|--archive|--shebang|--env|--path|--tail|--trace)
        eval "rvm_$(echo $rvm_token | sed 's/-//g')_flag=1"
      ;;

      reboot|flush|asdf|damnit|wtf|argh|work|workdamnit|BOOM|boom|wth)
        $rvm_action="reboot"
      ;;

      *)
        if [ ! -z "$rvm_token" ] ; then
          if [ ! -z "`echo $rvm_token | awk '/,/'`" ] ; then
            rvm_ruby_version="$rvm_token"
            if [ -z "$rvm_action" ] ; then
              rvm_action="ruby" # Not sure if we really want to do this but we'll try it out.
            fi
          else

            if [ ! -z "`echo $rvm_token | awk '/\.rb$/{print}' 2> /dev/null`" ] ; then # we have a specified ruby script
              rvm_ruby_args=$rvm_token
              rvm_ruby_file=$rvm_token
              if [ -z "$rvm_action" ] ; then
                rvm_action="ruby" # Not sure if we really want to do this but we'll try it out.
              fi
            else
              rvm_action="error"
              rvm_error_message="Unrecognized command line argument: '$rvm_token'"
            fi
          fi
        else
          rvm_action="error"
          rvm_error_message="Unrecognized command line argument(s): '$rvm_token $@'"
        fi
        if [ "$rvm_action" = "error" ] ; then
          break;
        fi

    esac
    if [ ! -z "$rvm_parse_break" -o ! -z "$rvm_error_message" ] ; then unset rvm_parse_break; break; fi
  done

  if [ ! -z "$rvm_error_message" ] ; then __rvm_pushpop ; return 1 ; fi
}

function rvm {

  __rvm_cleanup_variables
  __rvm_load-rvmrc
  __rvm_initialize
  __rvm_load_defaults
  __rvm_parse-args $@

  if [ -z "$rvm_trace_flag" ] ; then set +x ; else set -x ; fi
  result=0
  case "$rvm_action" in
    use)        __rvm_use              ; result=$? ;;
    gemdir)     __rvm_gem-dir          ; result=$? ;;
    gemdup)     __rvm_gem-dup          ; result=$? ;;
    srcdir)     __rvm_src-dir          ; result=$? ;;
    list)       __rvm_list             ; result=$? ;;
    version)    __rvm_version          ; result=$? ;;
    reset)      __rvm_reset            ; result=$? ;;
                # TODO: how can we use bin_path here for reload, default file?
    reload)     __rvm_reload           ; result=$? ;;
    implode)    __rvm_implode          ; result=$? ;;
    update)     __rvm_update           ; result=$? ;;
    readline)   __rvm_readline_install ; result=$? ;;
    iconv)      __rvm_iconv_install    ; result=$? ;;
    reboot)     __rvm_reboot           ; result=$? ;;
    usage|help) __rvm_usage            ; result=$? ;;
    benchmark)  __rvm_benchmark        ; result=$? ;;
    ruby)       __rvm_do               ; result=$? ;;
    inspect)    __rvm_inspect          ; result=$? ;;

    install|uninstall|remove)
      __rvm_manage_rubies
      result=$?
    ;;

    gemsync)
      rvm_source_gem_path=`__rvm_select ; echo $rvm_gem_home`
      __rvm_gem_sync
    ;;

    tests|specs)
      rvm_summary_flag=1
      rvm_action="rake"
      __rvm_do
    ;;

    info|debug)
      __rvm_version
      __rvm_info
      if [ "$rvm_action" = "debug" ] ; then __rvm_debug ; fi
    ;;

    error)
      __rvm_log "fail" "$rvm_error_message ( see: 'rvm usage' )"
      __rvm_pushpop
      result=1;
    ;;
    *)
      if [ ! -z "$rvm_action" ] ; then
        __rvm_log "fail"  "unknown action '$rvm_action'"
      else
        __rvm_usage
      fi
      result=1
  esac
  if [ "$rvm_trace_flag" = "1" ] ; then set +x ; unset rvm_trace_flag ; fi
  return $result
}